CVE-2025-7950: Public Chat Room SQLi Vulnerability

CVE-2025-7950 Overview

A critical SQL injection vulnerability has been identified in code-projects Public Chat Room version 1.0. The vulnerability exists in the /login.php file where the Username argument is not properly sanitized, allowing attackers to inject malicious SQL queries. This flaw can be exploited remotely without authentication, potentially compromising the entire database and user credentials.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, modify database contents, or potentially gain unauthorized access to the underlying system.

Affected Products

• Fabian Public Chat Room 1.0
• code-projects Public Chat Room 1.0

Discovery Timeline

• July 22, 2025 - CVE-2025-7950 published to NVD
• July 29, 2025 - Last updated in NVD database

Technical Details for CVE-2025-7950

Vulnerability Analysis

This SQL injection vulnerability affects the login functionality of Fabian Public Chat Room, a web-based chat application. The flaw resides in the /login.php file, which fails to properly sanitize user-supplied input in the Username parameter before incorporating it into SQL queries. This lack of input validation allows attackers to craft malicious input that manipulates the intended SQL query logic.

The vulnerability can be exploited remotely over the network without requiring any authentication or user interaction. The application directly concatenates user input into SQL statements rather than using parameterized queries or prepared statements, making it trivially exploitable by attackers with basic SQL injection knowledge.

Root Cause

The root cause is classified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), specifically manifesting as SQL injection. The /login.php script fails to implement proper input sanitization or parameterized queries when processing the Username field. User-supplied data is directly incorporated into SQL statements without escaping special characters such as single quotes, double quotes, or SQL comment sequences.

Attack Vector

The attack is network-based and can be executed remotely against the web application's login page. An attacker sends a specially crafted HTTP request to /login.php containing malicious SQL syntax in the Username parameter. The vulnerable application constructs a SQL query using this unsanitized input, which is then executed against the backend database.

Common attack patterns include authentication bypass using payloads like ' OR '1'='1, data extraction via UNION-based injection, and database manipulation through stacked queries. The exploit has been publicly disclosed, increasing the risk of widespread exploitation. For technical details, see the GitHub Issue for CVE-5 and VulDB #317096.

Detection Methods for CVE-2025-7950

Indicators of Compromise

• Unusual or malformed requests to /login.php containing SQL syntax characters such as single quotes, double dashes, semicolons, or UNION keywords
• Database error messages in application logs indicating SQL syntax errors
• Authentication success for non-existent usernames or multiple accounts
• Unexpected database queries or data extraction attempts in database audit logs
• Web server logs showing repeated POST requests to /login.php with varying payloads

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the Username parameter
• Enable database query logging and monitor for anomalous query patterns or syntax errors
• Implement application-level logging for failed authentication attempts with suspicious characters
• Use SentinelOne's real-time behavioral analysis to detect exploitation attempts and post-compromise activity

Monitoring Recommendations

• Monitor web server access logs for requests to /login.php containing encoded or plain-text SQL injection patterns
• Configure alerts for database errors related to malformed SQL queries
• Track authentication anomalies such as successful logins from unexpected IP addresses or unusual login patterns
• Review database audit logs for unauthorized data access or privilege escalation attempts

How to Mitigate CVE-2025-7950

Immediate Actions Required

• Immediately restrict access to the Public Chat Room application until patches are applied
• Implement Web Application Firewall rules to block SQL injection attempts targeting /login.php
• Review authentication logs for signs of prior exploitation and reset compromised credentials
• Consider taking the application offline if it handles sensitive data and no immediate fix is available

Patch Information

No official patch information is currently available from the vendor. Organizations using Fabian Public Chat Room 1.0 should contact Code Projects for remediation guidance. Given the public disclosure of this vulnerability, immediate action is required to protect affected systems. Monitor VulDB Submission #619313 for updates on remediation.

Workarounds

• Implement prepared statements or parameterized queries in the /login.php file to prevent SQL injection
• Deploy input validation to reject usernames containing special SQL characters such as quotes, semicolons, and comment sequences
• Place the application behind a Web Application Firewall with SQL injection detection rules enabled
• Restrict database user privileges to limit the impact of successful exploitation
• Consider implementing application-level rate limiting to slow down automated exploitation attempts

# Example WAF rule configuration (ModSecurity)
# Block SQL injection patterns in login parameters
SecRule ARGS:Username "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt blocked in Username parameter',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'attack-sqli'"